<template>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input type="text" v-model="obj.name"/>
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model="obj.age"/>
    </div>
    <div>
      <span>性别:</span>
      <select v-model="obj.gender">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="fn">添加/修改</button>
    </div>
    <div>
      <table
        border="1"
        cellpadding="10"
        cellspacing="0"
      >
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(item,index) in arr" :key="index">
          <td>{{index+1}}</td>
          <td>{{item.name}}</td>
          <td>{{item.age}}</td>
          <td>{{item.gender}}</td>
          <td>
            <button @click="del(item.id)">删除</button>
            <button @click="fn2(item.id,index)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>
<script>
export default {
  data () {
    return {
     obj:{
          name:'',
          age:'',
          gender:''
     },
     sum:0,
      arr:[
        {
          id:+new Date()+1,
          name:'Tom',
          age:18,
          gender:'男'
        },
        {
          id:+new Date(),
          name:'Aory',
          age:20,
          gender:'女'
        }
      ]
    }
  },
  methods:{
    fn(){
       if(this.sum===0){
        if(this.obj.name.trim()===''||this.obj.age.trim()===''||this.obj.gender===''){
             return  alert('不能为空')
      }
      this.arr.push(this.obj)
       }else{
        this.obj
        this.arr.splice(this.sum-1,1,this.obj)
        this.obj={
          name:'',
          age:0,
          gender:''
        }
        this.sum=0
       }
    },
    del(id){
    this.arr= this.arr.filter(item=>item.id!=id)
    },
    fn2(ind,index){
    this.obj={...this.arr[index]}
    this.sum=index+1
    }
  }
}
</script>
